| dc.contributor.author |
Natwariya, Pravin Kumar |
|
| dc.contributor.author |
Bhatt, Jitesh R. |
|
| dc.date.accessioned |
2020-07-25T16:20:36Z |
|
| dc.date.available |
2020-07-25T16:20:36Z |
|
| dc.date.issued |
2020-09 |
|
| dc.identifier.citation |
Natwariya, Pravin Kumar and Bhatt, Jitesh R., "EDGES signal in the presence of magnetic fields", Monthly Notices of the Royal Astronomical Society: Letters, DOI: 10.1093/mnrasl/slaa108, vol. 497, no. 1, pp. L35-L39, Sep. 2020. |
en_US |
| dc.identifier.issn |
1745-3933 |
|
| dc.identifier.uri |
https://doi.org/10.1093/mnrasl/slaa108 |
|
| dc.identifier.uri |
https://repository.iitgn.ac.in/handle/123456789/5570 |
|
| dc.description.abstract |
We study the 21-cm differential brightness temperature in the presence of primordial helical magnetic fields for redshift z = 10�30. We argue that the ?-effect that sets in at earlier time can be helpful in lowering the gas temperature to 3.2 K at z = 17. This effect can arise in the early Universe due to some parity-violating high-energy processes. Using the EDGES (Experiment to Detect the Global Epoch of Reionization Signature) results, we find the upper and lower limits on the primordial magnetic field to be 6 � 10?3 and 5 � 10?4 nG, respectively. We also discuss the effect of Ly?? background on the bounds. Our results do not require any new physics in terms of dark matter. |
|
| dc.description.statementofresponsibility |
by Pravin Kumar Natwariya and Jitesh R Bhatt |
|
| dc.format.extent |
vol. 497, no. 1, pp. L35-L39 |
|
| dc.language.iso |
en_US |
en_US |
| dc.publisher |
Oxford University Press |
en_US |
| dc.subject |
magnetic fields |
en_US |
| dc.subject |
MHD |
en_US |
| dc.subject |
cosmology: observations |
en_US |
| dc.subject |
dark ages |
en_US |
| dc.subject |
reionization |
en_US |
| dc.subject |
first stars |
en_US |
| dc.subject |
dark matter |
en_US |
| dc.title |
EDGES signal in the presence of magnetic fields |
en_US |
| dc.type |
Article |
en_US |
| dc.relation.journal |
Monthly Notices of the Royal Astronomical Society: Letters |
|